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Everett SD Community Resource Center B-1: Detention Pipe Calculations <br /> Flow Frequency Return Perioda for Mit3qated. POC� M1 <br /> Return Period Flov(afs) <br /> 2 year 0. 153�7E7 <br /> 5 year 0.207736 <br /> 10 year 0.247947 <br /> 25 year 0. 304118 <br /> 50 year 0. 350031 <br /> 100 year 0. 399585 <br /> Yearly Peaks for Predeveloped and Mitigated. POC M1 <br /> Year Predeveloped Mitigated <br /> :950 0.258 O. i36 <br /> iy51 0.596 0. 149 <br /> i552 0. 152 0. 139 <br /> i553 0.268 0. 126 <br /> :9�4 0.422 0. 118 <br /> :9�: 0.6?_3 0. 143 <br /> ;556 0. 507. 0. 169 <br /> i957 0.272 0. 156 <br /> 13:8 0. 530 0. 170 <br /> i9�9 0. 977 0. 183 <br /> 1950 0.219 0.14"7 <br /> 1961 0.295 0. 153 <br /> 1957 1 .276 0. 179 <br /> 1363 0.485 0.160 <br /> 1969 �.892 0.159 <br /> 1965 0.202 0. 142 <br /> t966 0. 14f3 0.133 <br /> 1967 0. 121 0. 120 <br /> 1968 0.221 0.108 <br /> 19�9 0. 379 0.198 <br /> 1970 1.087 0. 197 <br /> 19 ]1 0. 775 G.122 <br /> ] 972 0.4A1 . 0.138 <br /> 1'3"�3 0.923 J. 175 <br /> 19'74 0.297 0. 132 <br /> 1975 0.299 0.151 <br /> 19"76 0. 352 0. 135 <br /> 19'77 0.2�5 0. 153 <br /> 197t3 0. 137 0. 193 <br /> 1979 0. 159 0.123 <br /> I�E30 O.A?_2 O.i82 <br /> 1981 0. 185 0.132 <br /> 1 �82 0.259 0.131 <br /> 1983 0. 225 0.232 <br /> 1984 0. 3A0 O.lA9 <br /> 19A5 0. 196 0. 151 <br /> 19Bei 0. 369 0.161_ <br /> 1°67 0. 668 0.556 <br /> 198fl 0. 436 0.209 <br /> 1989 0. 196 0. 198 <br /> 1390 0. 484 0. 116 - <br /> 1991 0. 154 0. 190 <br /> 1992 0. 163 0. 196 <br /> 1993 0.:57_ G. 13? <br /> 1994 O. 1S8 0. 135 <br /> B-7 <br />